Rockrider 340 Mountain Bike Blue



Made for occasional mountain biking.
Comfortable leisure MTB thanks to a more upright seating position and front suspension, efficient thanks to a lightweight aluminium frame and Shimano 21 speeds.
Sizes guide

Cycling comfortRaised position. Ergofit ergonomic saddle. 80 mm front suspension.
EfficiencyAluminium frame. 21-speed Shimano.Wide rims, tyres suited to faster terrain.
PrecisionDouble V-brakes: powerful and lightweight. Tyres have good lateral grip.
Ease of useGrip shifters. Built-in chainring and derailleur guard.
Lifetime warrantyB'Twin offers a lifetime warranty on the frame, stem and handlebar.
WarrantyFrame, handlebar and stem have a lifetime warranty. 2-year warranty for parts (excl. wearing parts)
Technical Information

Exclusive Rockrider 340 frame with a raised steering position for multi-purpose use. Made from reinforced 6061-T4T6 aluminium that combines durability and low weight. "Sloped" unisex frame geometry is suitable for both men and women. Painted with 3 coats of paint and varnished designs for long-lasting protection.
Suntour XCT fork with 80 mm of travel and a stiffness adjustment dial.
No rear suspension.
Triple-chainring steel chainset (22/32/42 teeth) with a plastic guard. Shimano TY21 7-speed rear derailleur. Shimano TZ30 or Microshift MS22 front derailleur. SRAM MRX21 grip shifters with speed indicators. Shimano TZ21 cassette with 7 cogs, 14-28 teeth. KMC Z51 chain, wide for greater durability.
Front and rear V-brake system with a helical spring for more powerful braking. Aluminium MTB brake levers that require only 2 fingers to operate.
Semi-raised mountain bike handlebar for added comfort while riding. 600 mm wide steel handlebar that combines comfort and stability.
Aluminium stem, 90 mm (XS / S / M) or 110 mm (L / XL), with a 10° angle for maximum comfort.
Aheadset-type headset for greater resistance to impacts and rigidity in turns. B'Twin Sport 300 grips have a soft-touch finish for better grip and to extend the grip shifters.
Exclusive B'Twin Ergofit saddle with a wider "hammock" shape that evenly distributes pressure, resulting in a more comfortable seat.OrB'Twin Sport 100 saddle with high density foam for added comfort.
Seat post
Steel MTB seat post with a 29.8 mm diameter and 350 mm long.
B'Twin Alloy Single Wall 26" wheel with single-walled rims. Wide for longer-lasting durability. 36 spokes for greater resistance to impact. Quick-release on the front wheel for easier maintenance, transport and storage. Lock nut on back wheel to reduce risk of theft.
New Ralson Mountain Bike 26" x 1.95 tyres. High-performance tyres with buttons best suited for on road and short trails.
Flat mountain bike pedals with bearings, made from hard resin for less weight and added safety (less aggressive in the event of a slippery pedal).
14.85 kg in size M without pedals.
If you will need a spare part​ to be replaced, we have it all at our workshop. You will have to drop by our workshop to get your cycle serviced.
1) The components seen on the bicycle in the videos may change from the actual product. 2) The bicycle will be delivered in 85% assembled condition. The directions for the cycle assembly will be sent via mail ( if you have subscribed). The tools for assembly are provided with the cycle only for online buyers. 3) The 3-month, free check up is valid only if the user is able to take the bicycle to a decathlon workshop.4) All bicycle accessories need to be purchased separately.
Information / Concept / Technology
Frame : 100.0% Aluminium

Product test
We recommend that beginners wear cycling shorts with a protective pad and/or a gel saddle cover to reduce soreness.

Stockage tips
Store in a cool, dry place, away from corrosive products and salty air.

Maintenance tips
Regularly maintain your fork (clean and grease dampers), especially in winter. Take your bike to your Decathlon store's After-Sales Service, which offers a free safety inspection on all new bikes purchased.



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Happy to own it
Used for 2 to 8 weeks
I love this bike, light weight, awesome brakes and looks beautiful. When I go out on roads, many people turn their heads towards me. Get a gel seat cover. The seat is not comfortable as it is of Mountain bike standard. I travel to my office 20 kilometres to and fro.

There was a big scratch on the frame, so I asked the manager whether I can get something to compensate the scratch. The manager gave me free gel seat cover :)
Light weight, awesome brakes and great looks
Front gear give problems sometimes and seat
Disappointed with online service
Used for 1 week or less
Cycle is quite good, But the online process is quite disappointing.
1) Good bicycle.
2) Fast delivery.

1) But the issue was its not properly assembled as mentioned stating 85%, observed that the gear is not properly functioning. As stated , there was no guide or manual or tool kit to assemble the remaining things. Had to shed extra money for assembling the remaining things. While driving observed that gear is not properly functioning.

2) Quite a poor support service, with one reply they close the ticket, without the confirmation of customer issue is resolved or not.

Would say product is good, but would not suggest it to buy online as post online service the support is very poor.
Not properly assembled & no manual /guide/tool k
Not up to the mark
Used for 2 to 8 weeks
I bought this bicycle on 18th Nov 2016 (evening) from the Pune Decathlon store. I had evaluated several other brands as well but went with B'Twin hoping for better service and spare parts availability. While the bike was being tuned at the workshop, i went several times with my basic queries. But i told to wait out and that everything regarding bike maintenance would be explained to me before delivery. However, i was hardly explained anything, except how to remove the front tyre for carrying it on the back seat of my car. After reaching home i noticed that paint behind the fork above front wheel had scraped off. Very next morning i called the store and informed them. Thereafter, i was asked to email the photos which i did immediately. But to my surprise no one called me till date even after several follow ups and even a store visit on 28 Nov 2016. I am really disappointed with the service and yes, the bike makes a lot of noise while changing gears and you often need to go a gear up or down before coming back to the gear you want, in order to avoid noise. Overall, i think that this bike is not worth its price.
Contemporary design and looks
Noisy gear and customer service
Response of the brand

Thank for the detailed feedback. I will write to the Pune store and you will get a call back from to store in order to resolve the problem. 

Deepak Babu E-sport manager DECATHLON
Arunava not found this answer helpful
Average bicycle
I have already written a review on this product but I don't know why it is not displayed.
Regarding bicycle, I purchased it in the month may 2016(manufactured in Jan 2016) for an amount of 15,999/-,but when I saw the same product today they are selling it for 13,999/-which made me felt cheated and disappointed . I also felt that decathlon has sold old product to me without any discount . I also purchased accessories for this bike from decathlon and it's online partner snapdeal, same thing they sold products even manufactured in 2012,2013
So far I have riden about 2000km on this bike and performance is average. Front derailer is notchy and noisy and requires some effort to change gears. Looks wise good.
Response of the brand

Hello Pathuri, 

Thank you for taking the time to give us your review. Apologies for a late reply. All Rockrider 340s are priced even today at 15999/-. This very bike was also priced at 15999/- but we had to reduce the price because we had an over stock of the bicycle. The reduction in the price is only in this colour and not because there is a change in the quality or feature of the bike but only because of the excess quantities that we had produced. 

Regarding the accessories, the manufacture date should not matter because the shelf life of our products are high. You will still be getting a 2 year warranty on the accessory no matter when it was manufactured. If in any case, you had a quality problem within these 2 years,  you will get another one for free. 

Here is an article regarding how and when to change the gear( If you find that your derailleur is not shifting at particular gears, we can fix it by tuning it in our workshop. 
Deepak Babu E-sport manager DECATHLON
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